var old_menu=''; 
var old_cell=''; 
var old_bar=''; 
function menuclick(submenu,cellbar,bar){ 
if(old_menu!=submenu){
 if(old_menu!=''){
 document.getElementById(old_menu).style.display='none';
 document.getElementById(old_cell).src='/images/bot.jpg';
}
 document.getElementById(submenu).style.display='block';
 document.getElementById(cellbar).src='/images/smallbot.jpg';
 old_menu=submenu;
 old_cell=cellbar;
 old_bar=bar;
}
else{document.getElementById(submenu).style.display='none';
 document.getElementById(cellbar).src='/images/bot.jpg';
 old_menu='';
 old_cell='';
 old_bar='';
}}